The woman says she discovered disturbing references to Slender Man in her daughter's writing.

"We found things that she had written and she made reference to Slender Man. She also made references to killing," the mother told WLWT. "She even created a world for Slender Man in the game Mine Craft."

Slender Man, a tall, faceless being in a black suit, is a fictional character notorious for stalking and terrorizing children.

The Cincinnati woman says her daughter's attack may have been an attempt to appease Slender Man, and believes the Wisconsin incident may have pushed her over the edge.

The girl is being held in a juvenile detention center. Her mother suffered minor injuries, including cuts to her face and neck, as well as a wound to her back.